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1/*2 * Copyright 2018 Advanced Micro Devices, Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR20 * OTHER DEALINGS IN THE SOFTWARE.21 *22 * Authors: AMD23 *24 */25#include "dce_i2c.h"26#include "reg_helper.h"27 28bool dce_i2c_oem_device_present(29 struct resource_pool *pool,30 struct ddc_service *ddc,31 size_t slave_address32)33{34 struct dc *dc = ddc->ctx->dc;35 struct dc_bios *dcb = dc->ctx->dc_bios;36 struct graphics_object_id id = {0};37 struct graphics_object_i2c_info i2c_info;38 39 if (!dc->ctx->dc_bios->fw_info.oem_i2c_present)40 return false;41 42 id.id = dc->ctx->dc_bios->fw_info.oem_i2c_obj_id;43 id.enum_id = 0;44 id.type = OBJECT_TYPE_GENERIC;45 if (dcb->funcs->get_i2c_info(dcb, id, &i2c_info) != BP_RESULT_OK)46 return false;47 48 if (i2c_info.i2c_slave_address != slave_address)49 return false;50 51 return true;52}53 54bool dce_i2c_submit_command(55 struct resource_pool *pool,56 struct ddc *ddc,57 struct i2c_command *cmd)58{59 struct dce_i2c_hw *dce_i2c_hw;60 struct dce_i2c_sw dce_i2c_sw = {0};61 62 if (!ddc) {63 BREAK_TO_DEBUGGER();64 return false;65 }66 67 if (!cmd) {68 BREAK_TO_DEBUGGER();69 return false;70 }71 72 dce_i2c_hw = acquire_i2c_hw_engine(pool, ddc);73 74 if (dce_i2c_hw)75 return dce_i2c_submit_command_hw(pool, ddc, cmd, dce_i2c_hw);76 77 dce_i2c_sw.ctx = ddc->ctx;78 if (dce_i2c_engine_acquire_sw(&dce_i2c_sw, ddc)) {79 return dce_i2c_submit_command_sw(pool, ddc, cmd, &dce_i2c_sw);80 }81 82 return false;83}84